Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
GPT-5.3 Instant has the cleaner overall profile here, landing at 87 versus 85. It is a real lead, but still close enough that category-level strengths matter more than the headline number.
GPT-5.3 Instant's sharpest advantage is in agentic, where it averages 82.9 against 79.6. The single biggest benchmark swing on the page is MRCRv2, 94 to 84. GPT-5.2 Instant does hit back in multilingual, so the answer changes if that is the part of the workload you care about most.
GPT-5.3 Instant is also the more expensive model on tokens at $1.75 input / $14.00 output per 1M tokens, versus $1.50 input / $6.00 output per 1M tokens for GPT-5.2 Instant. That is roughly 2.3x on output cost alone.
Pick GPT-5.3 Instant if you want the stronger benchmark profile. GPT-5.2 Instant only becomes the better choice if multilingual is the priority or you want the cheaper token bill.
GPT-5.3 Instant
82.9
GPT-5.2 Instant
79.6
GPT-5.3 Instant
78.7
GPT-5.2 Instant
75.5
GPT-5.3 Instant
95
GPT-5.2 Instant
93.1
GPT-5.3 Instant
94.2
GPT-5.2 Instant
90.9
GPT-5.3 Instant
80.8
GPT-5.2 Instant
79.8
GPT-5.3 Instant
96
GPT-5.2 Instant
95
GPT-5.3 Instant
93.4
GPT-5.2 Instant
94.4
GPT-5.3 Instant
97.2
GPT-5.2 Instant
97.2
GPT-5.3 Instant is ahead overall, 87 to 85. The biggest single separator in this matchup is MRCRv2, where the scores are 94 and 84.
GPT-5.3 Instant has the edge for knowledge tasks in this comparison, averaging 80.8 versus 79.8. Inside this category, MMLU is the benchmark that creates the most daylight between them.
GPT-5.3 Instant has the edge for coding in this comparison, averaging 78.7 versus 75.5. Inside this category, SWE-bench Pro is the benchmark that creates the most daylight between them.
GPT-5.3 Instant and GPT-5.2 Instant are effectively tied for math here, both landing at 97.2 on average.
GPT-5.3 Instant has the edge for reasoning in this comparison, averaging 94.2 versus 90.9. Inside this category, MRCRv2 is the benchmark that creates the most daylight between them.
GPT-5.3 Instant has the edge for agentic tasks in this comparison, averaging 82.9 versus 79.6. Inside this category, OSWorld-Verified is the benchmark that creates the most daylight between them.
GPT-5.3 Instant has the edge for multimodal and grounded tasks in this comparison, averaging 95 versus 93.1. Inside this category, OfficeQA Pro is the benchmark that creates the most daylight between them.
GPT-5.3 Instant has the edge for instruction following in this comparison, averaging 96 versus 95. Inside this category, IFEval is the benchmark that creates the most daylight between them.
GPT-5.2 Instant has the edge for multilingual tasks in this comparison, averaging 94.4 versus 93.4. Inside this category, MMLU-ProX is the benchmark that creates the most daylight between them.
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